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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (c) 2014, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.servlet.internal;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import jakarta.servlet.ServletContext;

import org.glassfish.jersey.server.ResourceConfig;

/**
 * Utility class.
 *
 * @author Michal Gajdos
 */
public final class Utils {

    /**
     * Internal {@link jakarta.servlet.ServletContext servlet context} attribute name under which an instance of
     * {@link org.glassfish.jersey.server.ResourceConfig resource config} can be stored. The instance is later used to initialize
     * servlet in {@link org.glassfish.jersey.servlet.WebConfig} instead of creating a new one.
     */
    private static final String RESOURCE_CONFIG = "jersey.config.servlet.internal.resourceConfig";

    /**
     * Store {@link org.glassfish.jersey.server.ResourceConfig resource config} as an attribute of given
     * {@link jakarta.servlet.ServletContext servlet context}. If {@code config} is {@code null} then the previously stored value
     * (if any) is removed. The {@code configName} is used as an attribute name suffix.
     *
     * @param config resource config to be stored.
     * @param context servlet context to store the config in.
     * @param configName name or id of the resource config.
     */
    public static void store(final ResourceConfig config, final ServletContext context, final String configName) {
        final String attributeName = RESOURCE_CONFIG + "_" + configName;
        context.setAttribute(attributeName, config);
    }

    /**
     * Load {@link org.glassfish.jersey.server.ResourceConfig resource config} from given
     * {@link jakarta.servlet.ServletContext servlet context}. If found then the resource config is also removed from servlet
     * context. The {@code configName} is used as an attribute name suffix.
     *
     * @param context servlet context to load resource config from.
     * @param configName name or id of the resource config.
     * @return previously stored resource config or {@code null} if no resource config has been stored.
     */
    public static ResourceConfig retrieve(final ServletContext context, final String configName) {
        final String attributeName = RESOURCE_CONFIG + "_" + configName;
        final ResourceConfig config = (ResourceConfig) context.getAttribute(attributeName);
        context.removeAttribute(attributeName);
        return config;
    }

    /**
     * Extract context params from {@link ServletContext}.
     *
     * @param servletContext actual servlet context.
     * @return map representing current context parameters.
     */
    public static Map getContextParams(final ServletContext servletContext) {
        final Map props = new HashMap<>();
        final Enumeration names = servletContext.getAttributeNames();
        while (names.hasMoreElements()) {
            final String name = (String) names.nextElement();
            props.put(name, servletContext.getAttribute(name));
        }
        return props;
    }

    /**
     * Prevents instantiation.
     */
    private Utils() {
    }
}